My 70 Coronet RT (was in original EV2 paint) is a lynch road car that had no blackout. Its an October build date where Im assuming yours is after January. but I agree that Ive never seen blackout on b-body.

70 Coronet RT 440+6
64 Dodge 330 - Future Hemi Clone
17 Challenger Hellcat - Green Go Driver
86 Buick T-Type Turbo V-6